document.write( "Question 335677: Hello!\r
\n" ); document.write( "\n" ); document.write( "An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 6 hours. How long would it take the experienced accountant working alone?\r
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Algebra.Com's Answer #240748 by jrfrunner(365)\"\" \"About 
You can put this solution on YOUR website!
An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 6 hours. How long would it take the experienced accountant working alone?
\n" ); document.write( "---
\n" ); document.write( "Let E=time taken by experienced accountant
\n" ); document.write( "Let N=time taken by new accountant
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\n" ); document.write( "Given: An experienced accountant can balance the books twice as fast as a new accountant.
\n" ); document.write( "Therefore N=2*E or E=N/2
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\n" ); document.write( "Let 1/N = proportion of job completed by New accountant in \"one\" hour
\n" ); document.write( "Let 1/E = proportion of job completed by Experienced accountant in \"one\" hour
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\n" ); document.write( "\"Every\" hour working \"together\" they will accomplish
\n" ); document.write( "\"1%2FN%2B1%2FE\" of the job
\n" ); document.write( "since the job takes 6 hours for both working together then
\n" ); document.write( "\"6%2A%281%2FN%2B1%2FE%29=1++\"
\n" ); document.write( "\"6%2A%281%2F%282%2AE%29%2B1%2FE%29=1\" (substitute N=2*E or E=N/2)
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\n" ); document.write( "Solve for E
\n" ); document.write( "\"6%281%2F%282%2AE%29%2B2%2F%282%2AE%29%29=1\" (common denominator)
\n" ); document.write( "\"6%283%2F%282%2AE%29%29=1\"
\n" ); document.write( "9/E=1
\n" ); document.write( "E=9 hours
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